Finding the Fourth Proportional to 1,851.54, 2,776.39 and 680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.54 : 2,776.39 = 680.72 : x
2. Step 2: Convert to fraction form
   1,851.54/2,776.39 = 680.72/x
3. Step 3: Cross multiply
   1,851.54x = 2,776.39 × 680.72
4. Step 4: Simplify right side
   1,851.54x = 1,889,928.62
5. Step 5: Solve for x
   x = 1,889,928.62/1,851.54
6. Step 6: Final answer
   x = 1,020.74